Famous: Patrick Swayze.
Famous for `The Outsiders,’ `Dirty Dancing,’ `Ghost,’ `Point Break’ and `Donnie Darko.
Less famous: Don Swayze.
Less famous for `Beach Babes From Beyond,’ `Heathens and Thieves’ and a multi-episode run on FX’s `The Bridge.’

Famous: Dennis Quaid.
The Houston native is famous for `Breaking Away,’ `The Right Stuff,’ `Innerspace’ and `Far from Heaven.’
Less famous: Randy Quaid.
The Houston native has done some good work in `The Last Detail,’ `Vacation’ and `Kingpin;’ however, in the past couple of years, he’s been more famous for his legal troubles.

Photo: Getty Images

Famous: Dennis Quaid. The Houston native is famous for `Breaking...

Famous: Dennis Quaid.
The Houston native is famous for `Breaking... Photo-5183711.70156 - SFGate

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Famous: Lily Allen.
Famous for her work as a recording artist, but better known in England than the U.S. Named GQ’s “Woman of the Year” in 2009.
Almost as famous: Alfie Allen.
Almost as famous for his role as Theon Greyjoy on “Game of Thrones.” The popularity of “GoT” makes Alfie more recognizable in the U.S. than his big sis.

Photo: Getty Images

Famous: Lily Allen. Famous for her work as a recording artist, but...

Famous: Lily Allen.
Famous for her work as a recording artist,... Photo-5183712.70156 - SFGate

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Famous: Abigail Breslin.
Famous for `Little Miss Sunshine,’ which earned her an Oscar nomination, `Signs’ and the upcoming `Ender’s Game.’
Less famous: Spencer Breslin.
Less famous for `The Kid’ with Bruce Willis and `Dr. Seuss’ the Cat in the Hat.’

Famous: Alec Baldwin.
Famous for `Glengarry Glen Ross,’ `The Cooler,’ `Blue Jasmine’ and `30 Rock.’
Less famous: William Baldwin.
Less famous for `Internal Affairs,’ `Flatliners,’ `Backdraft’ and `The Squid and the Whale.’
Lesser famous: Stephen Baldwin.
Lesser famous for `The Usual Suspect,’ `Bio-Dome’ and a religious conversion.
Least famous: Daniel Baldwin.
Least famous for drug problems and appearances on celebrity reality shows such as `I’m a Celebrity, Get Me Out of Here!,’ `Celebrity Rehab With Dr. Drew,’ `Celebrity Fit Club’ and `Celebrity Blackjack.’

Famous: Jason Bateman.
Famous for `It’s Your Move,’ `Valerie,’ `Teen Wolf Too’ and `Arrested Development.’
Less famous: Justine Bateman.
Though she had her brother beat in the ‘80s with `Family Ties,’ Justine is less famous now for having been on `Family Ties.’

Famous: Jeff Bridges (right).
Famous for “The Big Lebowski,” “The Last Picture Show,” “The Contender,” “True Grit” and his Oscar win for “Crazy Heart.”
Less famous: Beau Bridges.
Less famous for winning a Golden Globe for his performance in “The Positively True Adventures of the Alleged Texas Cheerleader-Murdering Mom.”

Famous: Francis Ford Coppola.
Famous for being the Godfather of current American directors, winning five Oscars for his work on “The Godfather,” “The Godfather: Part II,” and “Patton.”
Less Famous: Talia Shire.
Less famous for playing Adrian in the “Rocky” movies and being the mother of Jason Schwartzman.

Photo: Getty Images

Famous: Francis Ford Coppola. Famous for being the Godfather of...

Famous: Francis Ford Coppola.
Famous for being the Godfather of... Photo-5183718.70156 - SFGate

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Famous: Zooey Deschanel.
Famous for her work in `Elf,’ `(500) Days of Summer’ and Fox’s `New Girl.’ She’s also one half of indie band She & Him with M. Ward.
Less famous: Emily Deschanel.
Less famous for her own Fox show, `Bones.’

Photo: Getty Images

Famous: Zooey Deschanel. Famous for her work in `Elf,’ `(500)...

Famous: Zooey Deschanel.
Famous for her work in `Elf,’ `(500)... Photo-5183719.70156 - SFGate

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Famous: Matt Dillon (right).
Famous for “Crash,” “Drugstore Cowboy” and “There’s Something About Mary.”
Less famous: Kevin Dillon.
Less famous for playing Drama, the less-famous actor-brother of Vincent Chase, on “Entourage.”

Famous: Chris Farley (center).
Famous for living in a van down by the river, `Tommy Boy’ and `Black Sheep.’
Less famous: John Farley (right).
Less famous for `Extreme Movie’ and `Get Smart.’
Less famous: Kevin P. Farley.
Less famous for `An American Carol’ and `Dude, Where’s My Dog?!’

Photo: Getty Images

Famous: Chris Farley (center). Famous for living in a van down by...

Famous: Chris Farley (center).
Famous for living in a van down... Photo-5183723.70156 - SFGate

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Famous: James Franco.
Famous for being one of the great artist/thinkers of his generation. Just kidding, Franco has an Oscar nomination for “127 Hours,” chooses interesting roles and is second only to Jeff Bridges in his ability to play a stoner.
Less famous: Dave Franco.
Less famous for “Now You See Me” and smaller roles in “Warm Bodies” and “21 Jump Street.”

Photo: Getty Images

Famous: James Franco. Famous for being one of the great...

Famous: James Franco.
Famous for being one of the great... Photo-5183724.70156 - SFGate

Famous: Ron Howard.
Famous as an actor in `The Andy Griffith Show,' `Happy Days' and `American Graffiti.' Famous as a director for `Parenthood,' `Backdraft,' `Apollo 13' and `A Beautiful Mind,' for which he won an Oscar. Also famous as the voice of `Arrested Develop.'
Less famous: Clint Howard.
Less famous for his work as the jam-sandwich-eating kid on `The Andy Griffith Show.'

Famous: Rob Lowe (right).
The eternally youthful actor is famous for his membership in the Brat Pack in the 1980s (`The Outsiders,’ `St. Elmo’s Fire’) and his work in `Wayne’s World,’ `The West Wing,’ `Parks and Recreation’ and `Behind the Candelabra.’
Less famous: Chad Lowe.
Less famous for being the ex-husband of Hilary Swank.

Somewhat famous: Michael Madsen.
He had success with `Reservoir Dogs’ and the `Kill Bill’ films. He also has a line of hot sauces.
Somewhat famous: Virginia Madsen.
Her career saw resurgence in 2004 with an Oscar nomination for her role in `Sideways,’ but she hasn’t done a lot since.

Famous: Eddie Murphy.
Famous for his huge breakout on`Saturday Night Live’ and in standup specials (`Raw,’ `Delirous’) followed by major box-office hits such as ‘48 Hrs.,’ ‘Trading Places,’ `Beverly Hills Cop’ and `The Nutty Professor.’ Eddie is also famous for some box-office bombs like `Norbit’ and `The Adventures of Pluto Nash.’
Less famous: Charles Q. Murphy.
Less famous for `CB4’ and some work on `Chapelle’s Show.’

Famous: Bill Murray.
Famous for `Meatballs,’ `Caddyshack,’ `Stripes,’ `Ghostbusters,’ `Groundhog Day,’ `Rushmore,’ `Kingpin,’ `Lost in Translation’ … the list goes on and on.
Less famous: Brian Doyle-Murray (left).
Less famous for some time spent on `Saturday Night Live,’ though you’ll recognize his face.
Lesser famous: Joel Murray.
Lesser famous for `Shameless.’ He also has a face you’ll know.

Famous: Michelle Pfeiffer (right).
Famous for `Scarface,’ `Dangerous Liaisons,’ `The Fabulous Baker Boys,’ `Love Field’ and `Cheri.’
Less famous: Dedee Pfeiffer.
Less famous for small roles in a bunch of Michelle’s movies.

Famous: Julia Roberts.
Famous for `Steel Magnolias,’ `Pretty Woman’ and her Oscar-winning performance in `Erin Brokovich.’
Less famous: Eric Roberts.
Less famous for an Oscar nomination for `Runaway Train,’ being Julia’s brother and Emma Roberts’ father.

Famous: Sylvester Stallone.
Famous for `Rocky,’ which he wrote and starred in, `Rambo,’ `Over the Top’ and `Cop Land,’ among other films. He also wrote and directed `Staying Alive,’ the 1983 sequel to `Saturday Night Fever.’
Less famous: Frank Stallone.
Less famous earning a Golden Globe nomination for Best Original Song for `Staying Alive.’

Photo: Getty Images

Famous: Sylvester Stallone. Famous for `Rocky,’ which he wrote...

Famous: Sylvester Stallone.
Famous for `Rocky,’ which he wrote... Photo-5183734.70156 - SFGate

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Famous: Emma Thompson (right).
Famous for Oscar wins for `Sense and Sensibility’ and `Howards End.’
Less famous: Sophie Thompson.
Less famous for a small role in `Harry Potter and the Deathly Hallows: Part 1.’

Famous: John Turturro.
Famous for his work in the Coen brothers’ `Barton Fink,’ `The Big Lebowski’ and `O Brother, Where Art Thou?’
Less famous: Nicholas Turturro.
Less famous for `NYPD Blue’ and `I Now Pronounce You Chuck & Larry.’

Photo: Getty Images

Famous: John Turturro. Famous for his work in the Coen brothers’...

Famous: John Turturro.
Famous for his work in the Coen... Photo-5183736.70156 - SFGate

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Famous: Mark Wahlberg (right).
Famous for leaving his Marky Mark persona behind and finding success and critical acclaim as an actor in `Boogie Nights,’ `The Fighter’ and `The Departed.’
Less famous: Donnie Wahlberg.
Less famous for his ongoing, albeit successful, relationship with the New Kids on the Block and some roles in movies such as `The Sixth Sense’ and three of the `Saw’ films, in addition to work on TV’s `Blue Bloods’ and `Boston’s Finest.’